Nicke Nymans BMW E21 M20 Turbo
![[Picture]](http://savarturbo.se/stuff/images/nicke_e21_tic/PICT0884.JPG){kind=link}
A page about how I fixed the missing boot loader after we replaced the AVR (why? long story) :
MembersPage/MattiasSandgren/NickesBMW/AvrBootCode
Genboard specific configuration
This is a v3.2 with production number 127.
Both triggers are configured for Hall.
Ignition outputs
| 00 | IGBT (Currently used to drive an MSD 6A) |
| 01 | IGBT |
| 02 | IGBT |
| 03 | IGBT |
| 04 | SDA (PD1) - on JP1 connector (current default for AntiLagSystem) |
| 05 | SCL (PD0) - on JP1 connector |
| 06 | IGBT |
| 07 | Ground for SCL and SDA |
EGT - only first input used.
LCD and PS2 - are brought through a DSUB25 as described here : GenBoard/BuildProcedures/LCDconnect
MAP - MPX4250AP 250kPa=2.5 bar (1.5 bar boost) using a push-in connector in the front plate.
Injector driver flyback - GenBoard/Manual/PowerFlyback
Q: Is [this] wiring method for SDA and SCL signals a stupid move? I'm thinking of running by the IGBTs in use. Currenly only one ('00').
![[this]](http://www.vems.hu/files/MembersPage/MattiasSandgren/sda_scl_wired_to_igbt_pins.jpg){kind=link}
- should work, but
- why not shorter traces, at the endplate side of the board (instead of the econoseal - frontplate - side) ?
- secure the wires with hotmelt, to avoid breaking due to vibration
What is the brownish (slightly burnt?) GND5 at the non-used IGBT position at the lower right corner ?